chore: remove DatabaseWithDebugError #3687

Job	Run time
check no-default-features	21s
check serde	33s
check std	33s
clippy	1m 32s
docs	1m 19s
test no_std	25s
test stable --no-default-features	1m 2s
test stable	1m 5s
test stable --all-features	1m 36s
test beta --no-default-features	1m 0s
fmt	13s
test beta	57s
test beta --all-features	1m 35s
test nightly --no-default-features	47s
test nightly	47s
test nightly --all-features	1m 16s
	15m 1s

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